Сборник задач по подготовке учащихся к международным исследованиям timss и pisa
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Task 22. Movement. First train’s speed is 70 km / h and the second’s speed is 5 km / h less. Question 1. How many kilometers will each train pass individually in 5 hours? Answer: ________. Question 2. If the train went at once to meet each other on the road 270 km long, then after many hours will be their meeting ? Answer: ________. Task 23. The function and its graph. Figure 7 shows a graph of the function c bx ах х f + + = 2 ) ( . Fig. 7 Using the graph of the function, answer the questions. Question 1. Write down the coordinates of the vertex of the parabola. Question 2. Write down the equation of the axis of symmetry of the graph of the function. Question 3. Find the point of maximum function. Task 24. The function and its graph. Figure 8 shows a plot of the function c bx ах х f + + = 2 ) ( . Fig. 8 144 Using the graph of the function, answer the questions. Question 1. Write down the coordinates of the symmetry of the function graph. Question 2. Find the coordinates of the minimum point of the function. Question 3. Record the set of values of the function, if the argument values belong to the interval [-1; 1]. Task 25. The corners. What is the angle ABC, if the angle РOK = 230 (Fig. 9)? Fig. 9 Task 26. The corners. жүктеу/скачать 3,47 Mb. Достарыңызбен бөлісу:
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